Tape cassette

Abstract

 A tape cassette (10) accommodating at least one tape-like member (18, 22, 26) has an accommodation case (14) and a cover member (12) for covering the accommodation case (14). An exit slit (32) is formed in the accommodation case (14), said of least one tape-like member (18,22,26) being fed out of the tape cassette (10) through the exit slit (32). A protruding portion (36) is formed on the accommodation case (14) adjacent the exit slit (32), the protruding portion (36) protruding from the case by a predetermined amount in the feeding direction of said at least one tape-like member (18,22,26) and extending along the exit slit (32). A pair of snapping members (102a, 102b) are provided on one of the cover member (12) and the accommodation case (14), while a receiving member (100) is provided on the other for receiving the snapping members (102a,102b) so as to fix the cover member (12) onto the accommodation case (14).

Description

[0001] The present invention relates to a tape cassette suitable for use with a printing device which is capable of printing images, such as alphanumeric characters, onto a tape-like recording medium.

[0002] Previously there has been proposed a printing device for creating a printed tape by printing reversed images of characters and the like on the backside of a transparent tape, and by adhering the transparent tape to a double-sided adhesive tape having a release paper on one side thereof. The created tape may then be adhered to a video cassette and the like as an index and the like.

[0003] A tape cassette is exchangeably mounted to this kind of printing device. In the printing device, there is provided a cutter. The tape created as explained above passes out from the tape cassette and is cut by the cutter provided in the printing device.

[0004] After the tape has been cut, the extreme end of the tape projects outwardly from the tape cassette because the tape was cut outside the cassette. If the tape cassette is detached from the printing device with the extreme end of the tape projecting from the cassette, should the extreme end of the tape be inadvertently touched by a finger the tape at the exit portion may be pushed inside the cassette case. Alternatively, the extreme end of the tape may be retracted inside the cassette case due to back tension of the film tape.

[0005] The amount of the tape projecting from the cassette case is relatively large with respect to the thickness of the cassette case. Thus, when the extreme end of the tape is retracted into the cassette case, it is not easy to pull out from the cassette case the extreme end of the tape and it can be a laborious and time-consuming job to draw the end of the tape out of the tape cassette. Further, when the tape cassette is coupled to the printing device with the extreme end of the tape retracted into the tape cassette and the tape is fed by the device, a problem arises in that the tape cannot be fed out of the tape cassette.

[0006] Previously proposed tape cassettes can also comprise a lower case member 16b and an upper cover member 16a as shown in Fig. 14. Pins 29 are provided on the under surface of the upper cover member 16a. The pins 29 are inserted into holes 31 formed in the side wall of the lower case member 16b. A tape member 26 is, in this example, wound around a spool 28, which is rotatably fitted on a shaft 27 projecting from the lower case member 16b.

[0007] With this construction, if the tape 26 is an adhesive tape provided with a release paper, the release paper may deform, or be expanded due to environmental heat or humidity, changing the internal stresses in the wound tape 26 resulting in the wound tape member being distorted in an axial direction to assume a slightly conical state. In such a case, as shown in Fig. 15, the outer circumference of the tape member 26 can press upwardly against the upper cover member 16a to deform the shape of the body of the tape cassette 16.

[0008] When the tape cassette 16 is deformed in this way by distortion of the tape member 26, in trying to return to its original shape the upper cover member 16a strongly abuts against the upper portion of the tape member 26. To feed the tape member 26 from the tape cassette 16, the wound tape member 26 rotates together with the adhesive tape spool 28. Accordingly, if the upper cover member 16a strongly abuts against the upper surface of the wound tape member 26, a large resistance against rotation is applied to the tape member 26, impeding feeding of the tape member 26 from the cassette.

[0009] Further, there is also a problem in that, when the tape cassette 16 is deformed, a cover of the printing device cannot be closed when the tape cassette 16 is attached to the printing device.

[0010] According to a first aspect of the present invention there is provided a tape cassette comprising a case and a tape-like member contained in the case, said case being provided with an aperture for the exit of said tape-like member from said case along a feed path, characterised in that said case is provided with protrusion means adjacent said exit aperture, said protrusion means protruding from said case in the general direction of the feed path.

[0011] With a tape cassette of this construction, the extreme end of the tape member accommodated in the cassette is substantially prevented from retracting inside the cassette case.

[0012] According to a second aspect of the present invention there is provided a tape cassette comprising a case and a tape-like member contained in said case, said case including a main accommodation case member and a cover member, said tape cassette further comprising engagement means provided on one of said cover member and said accommodation case member and receiving means provided on the other one of said cover member and said accommodation member, said engagement means and said receiving means being arranged to cooperate when said accommodation case member and cover member are put together to fix said cover member to said accommodation case member.

[0013] With a cassette of this construction, the abovementioned problem of deformation of the cassette case may be substantially overcome.

[0014] According to a third aspect of the present invention there is provided a tape cassette accommodating a tape-like member wound around a spool, said tape cassette comprising an accommodation case member provided with a shaft, said spool being rotatably fitted on said shaft, and a cover member for covering said accommodation case member, an exit aperture being formed in said accommodation case member, for the feeding therethrough of said tape-like member,
   wherein said accommodation case member has at least one protruding portion at said exit aperture, said protruding portion protruding by a predetermined amount in the feeding direction of said tape-like member and extending along said exit aperture, and
   wherein said tape cassette further comprises:
   engagement means provided on one of the extreme end of said shaft and said cover member; and
   receiving means provided on the other of said extreme end of said shaft and said cover member for receiving said engaging means to fix said cover member to said accommodation case member.

[0015] According to a fourth aspect of the present invention there is provided a combination of a cassette, in accordance with the above mentioned first aspect of the present invention, with a printing device, said printing device being provided with cutter means for cutting said tape-like member in the vicinity of said exit aperture when said cassette is, in use, mounted to the printing device.

[0016] According to a fifth aspect of the present invention there is provided a tape cassette comprising a case, a tape-like member contained in the case and tensioning means for tensioning said tape-like member when the cassette is inserted into a cassette accommodation chamber of a printing device, said tensioning means comprising a pivotable lever arranged to be pivoted to a tensioning position by the action of camming means provided thereon and further camming means associated with the cassette accommodation chamber of the printing device.

[0017] An embodiment of tape cassette in accordance with the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

Fig. 1 is plan view of a tape cassette embodying the present invention from which almost all the portion of an upper cover member is removed;

Fig 1B is an enlarged detail sectional plan view of the tape exit aperture of the cassette of Fig. 1;

Fig. 2 is a plan view of a printing device to which the tape cassette is suitable for attachment;

Fig. 3 is perspective view of the cassette accommodation unit of the printing device shown in Fig. 2;

Fig. 4 is an exploded perspective view of a tension lever in the tape cassette shown in Fig. 1;

Fig. 5 is a diagram illustrating a torsion spring mounted to the support shaft of the tension lever shown in Fig. 4;

Fig. 6 is a diagram illustrating the process for inserting the tension lever shown in Fig. 5 into a shaft receiving cylinder on a lower cassette case member;

Fig. 7 is diagram showing the tension lever shown in Fig. 5 inserted into the shaft receiving cylinder on the lower cassette case member;

Fig. 8 is a cross sectional view illustrating contact between the tension lever of a thintape cassette and an inclined piece of a thermal print head;

Figs 9A and 9B illustrate initial and final rotation positions respectively of the tension lever of Fig. 8 when the thin tape cassette is mounted to the printing device;

Fig. 10 is a cross sectional view illustrating contact between the tension lever of a thick tape cassette and an inclined piece of a thermal print head;

Figs. 11A and 11B illustrate initial and final rotation positions respectively of the tension lever of Fig. 10 when the thick tape cassette is mounted to the printing device;

Fig. 12A is a cross sectional view illustrating the engaged state of the upper cover member and lower case member of a thin tape cassette;

Figs. 12B and 12C show snapping members and a receiving member respectively;

Fig. 13 is a cross sectional view illustrating the engaged state of the upper cover member and lower case member of a thick tape cassette;

Fig. 14 is a cross sectional view illustrating the engaged state of the upper cover member and lower case member of a prior art tape cassette; and

Fig. 15 is a cross sectional view, similar to that of Fig. 14, showing a deformed state of the prior art tape cassette.

[0018] Fig. 1 shows the arrangement of a tape cassette 10 embodying the present invention.

[0019] The tape cassette 10 has a cassette case 16 composed of an upper cover member 12 and a lower case member 14 (in Fig. 1, almost all the portion of the upper cover member 12 is removed). Suitably and rotatably disposed in the cassette case 16 are:
   a tape spool 20 around which a film tape 18 is wound;
   a ribbon spool 24 around which an ink ribbon 22 is wound;
   an adhesive tape spool 28 around which is wound a double-sided adhesive tape with a release paper 26 provided thereon with the release paper side facing outwardly; and
   a ribbon winding spool 30 for winding the ink ribbon 22 fed from the ribbon spool 24.

[0020] A tape drive roller 34 is also rotatably disposed in the vicinity of a tape exit aperture in the form of an exit slit 32 opened at one side of the cassette case 16. The tape drive roller 34 feeds out a tape T, which, in the illustrated embodiment, is composed of the above film tape 18 adhered to the double-sided adhesive tape 26, from the tape exit slit 32 in association with a tape feed roller 62 of a printing device to be described later.

[0021] A printing device which the tape cassette is suitable for coupling to is shown in Fig. 2.

[0022] As shown in Fig. 2, the printing device 40 includes:
   character input keys 42 for inputting characters and the like;
   a print key 44;
   a keyboard 46 on which various kinds of function key are provided;
   a liquid crystal display 48 for displaying characters and the like input through the keyboard 46; and
   a cassette accommodation unit 50 to which the tape cassette 10 is to be attached.

[0023] A hinged accommodation cover 52 is provided to cover the chamber of the accommodation unit for the tape cassette 10 at the rear portion of the printing device 40. The tape cassette 10 is attachable/detachable when the accommodation cover 52 is hinged opened.

[0024] Fig. 3 schematically shows the cassette accommodation unit 50.

[0025] In the cassette accommodation unit 50, a ribbon winding shaft 54 extends upwardly. The ribbon winding shaft 54 is rotatably driven by a pulse motor and is arranged to engage the ribbon winding spool 30 of the tape cassette 10 (when the cassette is attached to the unit 50) to rotate the ribbon winding spool 30 in order to wind the ink ribbon 22 onto the spool 30. Further, a tape drive shaft 56 also extends upwardly and is arranged to engage the tape drive roller 34 to rotate the same. The tape drive shaft 56 is engaged with a motor (not shown) through a gear transmission mechanism (not shown).

[0026] A thermal print head 58 and platen roller 60 are oppositely positioned and the abovementioned tape feed roller 62 is arranged to cooperate with the tape drive roller 34 to feed the adhered tape T. Although not described in detail, the platen roller 60 and feed roller 62 are supported by a roller holder and are switchable between a print position and a release position by a switch mechanism (not shown). This switch mechanism may be as described in Japanese Patent Provisional Publication HEI 3283814 and accordingly a description thereof is omitted here.

[0027] The above thermal print head 58 includes a plurality of heating elements for printing images, such as characters and the like, on the film tape 18 using the ink ribbon 22.

[0028] A tape cutter 64 is also disposed at a position adjacent to one side of the cassette accommodation unit 50 to cut the adhered tape T discharged from the tape exit slit 32 of the tape cassette 10.

[0029] The tape cutter 64 is composed of a fixed blade 66 and movable blade 68 on opposite sides of the path of the tape T. The fixed blade 66 is fixedly arranged at a position adjacent to the tape exit slit 32, and the movable blade 68 is movably positioned at a position away from the tape exit slit 32.

[0030] Although not described in detail, the mechanism for driving the tape cutter 64 transmits the drive force of a motor to the movable blade 68 through a gear mechanism to move the movable blade 86 about its fulcrum. Thus, the adhered tape T is cut off by the closing operation of the movable blade 68 in association with the fixed blade 66.

[0031] A tension lever 70 for stretching the above ink ribbon 22 is rotatably disposed about a shaft 72 as shown in Fig. 1. As shown in detail in Figs. 4 to 7, an end of the shaft 72 is inserted into a cylindrical shaft receiving hole 80 provided on the inner bottom surface of the lower case member 14.

[0032] During initial assembly, the opposite ends of a torsion spring 74, through which the support shaft 72 extends, engage against stepped portions 76, 78 of the tension lever 70, as shown in Fig. 5. On inserting the end of shaft 72 into hole 80, as shown in Fig. 6, one end of the spring 74a of the above torsion spring 74 slides down along the slanted surface 82a of a piece 82 which is provided on the inner bottom surface of the lower case member 14 (See Fig. 6) and is then locked by engaging below a hook portion 84 formed below the slanted surface (See Fig. 7). With this arrangement, the tension lever 70 is urged by the torsion spring 74 to rotate anti-clockwise in Fig. 1 about the support shaft 72.

[0033] As described above, the end of the support shaft 72 of the tension lever 70 is inserted into the cylindrical shaft receiving hole 80 after the torsion spring 74 has been mounted to the support shaft 72. Thus, when the support shaft 72 of the tension lever 70 is inserted into the hole 80, the torsion spring 74 is prevented from coming off the support shaft 72, aiding assembly.

[0034] A bent portion 86 extends from the extreme end of the tension lever 70 to abut against the ink ribbon 22. In use the ink ribbon 22 is arranged to pass over an externally projecting edge 88 of the bent portion 86 before being wound onto the ribbon winding spool 30.

[0035] A contact piece 90 projects from a middle portion of the tension lever 70 to confront the backside of the thermal print head 58 when the tape cassette 10 is attached to the cassette accommodation unit 50. As shown in Fig. 3, camming means, in the form of a pair of inclined pieces 92a and 92b having different heights, are disposed in parallel on the backside of the thermal print head 40. In this embodiment, in the case of a thin cassette 10A containing a narrow tape 18, the contact piece 90a is arranged to engage the higher inclined piece 92a, as shown in Figs. 8, 9A and 9B. In the case of a thick cassette 10B containing a wide tape 18, the contact piece 90B is arranged to engage the lower inclined piece 92a, as shown in Figs. 10, 11A and 11B.

[0036] With this arrangement, as the thin tape cassette 10A is attached to the cassette accommodation unit 50, the contact piece 90a engages with the higher inclined piece 92a on the backside of the thermal print head 58 at an early stage, as shown in Figs. 9A and 9B. Therefore, the tension lever 70 begins to be rotated relatively early. As the thick tape cassette 10B is attached, because the contact piece 90b of the tension lever 70 engages with the lower inclined piece 92b at a later stage than in the case of the thin tape cassette 10A, as shown in Figs. 11A, 11B, the tension lever 70 begins to be rotated relatively later in time.

[0037] This release timing is earlier when the thin tape cassette 10A is used than when the wide tape cassette 10B is used. If it were early when the thick tape cassette 10B is used, there is a possibility that the ink ribbon 22 would catch the edge of the thermal print head 58 when the cassette is removed, and therefore the release timing when thick tape cassette 10B is used is delayed with respect to the case when the narrow tape cassette 10A is used.

[0038] The contact pieces 90a, 90b have upwardly inclined surfaces at the lower edges thereof, and the inclined pieces 92a, 92b have downwardly inclined surfaces at the upper edges thereof to correspond with the upwardly inclined surfaces. When the cassette tape is attached to the cassette accommodation unit 50 from above, the above-described inclination of the surfaces causes the contact pieces 90a, 90b to slide along the inclined surfaces of the inclined pieces 92a, 92b respectively to smoothly rotate the tension lever 70.

[0039] As the tension lever 70 is moved, the length of a path of the ink tape from the ribbon spool 24 to the ribbon winding spool 30 becomes equal to or longer than before rotation of the tension lever 70. Therefore, even if the ink ribbon is only loosely wound before the tape cassette is used, when the tape cassette is actually attached to the printing device any slack in the ink ribbon is taken up. Further, since the ink ribbon 22 is released from contact with the tension lever 70 at an externally projecting edge 88, the ink ribbon 22 is prevented from being electrostatically attracted to the backside of the tension lever 70 allowing smooth feeding of the ink ribbon 22.

[0040] When the illustrated embodiment of tape cassette 10 is being attached to the cassette accommodation unit 50 of the printing device 40, first the contact piece 90 of the tension lever 70 of the tape cassette 10 is abutted against the inclined piece 92 of the thermal print head 58. Then, when the tape cassette 10 is further inserted into the cassette accommodation unit 50 to assume a fully attached position, the above contact piece 90 slides along the inclined piece 92 to cause the tension lever 70 to be rotated, about the support shaft 72 as a fulcrum, to a predetermined position.

[0041] Preferably (not shown) the depth of projection of the contact piece 90 is set in accordance with the kind of an ink used in the ink ribbon 22. The ink used for the ink ribbon 22 may be, for example, of a wax type or a resin type. If the ink is of the resin type, ink deposited in printing cools and solidifies in a relatively short time period after it has been printed. As a result the ink ribbon must be exfoliated by a large amount. To achieve this, the contact piece 90 has a large projection depth so that the film tape is exfoliated from the ink ribbon at a large exfoliating angle.

[0042] On the other hand, if the ink is of the wax type, the time necessary for the ink to cool and solidify is not so short, and thus the exfoliating angle should be small to provide sufficient time for the ink ribbon 22 to be fixedly adhered to the film tape.

[0043] The arrangement of the ribbon winding spool 30 will be described with reference to Fig. 1. In Fig. 1. a clutch coil spring 94 is attached to the base portion of the ribbon winding spool 30. Although an end of the clutch coil spring 94 is pressed against the ribbon winding spool 30, the other end thereof is locked by the locking piece 96 on the lower case member 14. Consequently, when a tension larger than a predetermined value is applied to the ribbon winding spool 30 when printing, the ribbon winding spool 30 may be idly rotated by slippage of the above clutch coil spring 94 to adjust the winding torque.

[0044] Further, as shown in Figs. 12A, 12B, 12C and 13, the upper cover member 12 is unremovably engaged with the lower case member 14 by the following arrangement in the case of both the thin tape cassette 10A and the thick tape cassette 10B. That is, a bridge portion 100 (Fig. 12C) is formed at the extreme end of a cylindrical shaft 98a or 98b on which the adhesive tape spool 28 is fitted and a pair of elastic snapping projections 102a, 102b (Fig. 12b) are provided on the inside surface of the upper cover member 12 to snap over the bridge portion 100 from opposite sides thereof. As a result, when the upper cover member 12 is placed on the lower case member 14, the snapping pieces 102a, 102b elastically snap over the bridge portion 100 of the cylindrical shaft 98a, 98b from the opposite sides thereof to prevent bowing of the upper cover member 12. Thus distortion of the double-sided adhesive tape 26 wound around the adhesive tape spool 28 in the axial direction of the spool 28, such as might be caused by the viscosity of the ink due to the heat of a print head, humidity in the environment where the device is used, and the like is substantially prevented by the lower surface of the upper cover member 12, as shown in Figs. 12A and 13.

[0045] The upper cover member is thus securely engaged to the lower case member by an engagement portion and a locking piece, which are provided on one and the other of the extreme end of the shaft provided on the lower case member and the upper cover member. Thus, the tape cassette is not deformed by the expansion of the release paper due to the influence of a temperature, humidity and the like.

[0046] Further, protruding means in the form of a bill-shaped tape receiving portion 36 is provided at the tape exit slit 32 of the tape cassette 10 and extends, in the general direction of the path in which tape T is, in use, fed, to the vicinity of the extreme end of the fixed blade 66.Thus, the extreme end of the tape T fed through the tape exit slit 32 of the tape cassette 10 is guided to the ends of both the fixed blade 66 and the movable scissor blade 68 of the tape cutter 64.

[0047] Next, there will be described an operation for printing characters and the like on the film tape 18 accommodated in the tape cassette 10 and producing the adhered tape T by adhering the double-sided adhesive tape 26 to the film tape 18.

[0048] In the illustrated embodiment of tape cassette, characters and the like are thermally printed on a surface of the film tape 18 through the ink ribbon 22, based on print information supplied to the thermal print head 58. During printing the film tape 18 is overlapped with the ink ribbon 22 and is passed between the thermal print head and the platen roller. After printing thereon, the film tape 18 is adhered to the adhesive tape 26, by the action of the tape drive roller 34 and tape feed roller 62, and is fed out of the tape exit slit 32 as an adhered tape T. After the completion of the tape printing operation, the adhered tape T is cut off using the movable blade 68 and fixed blade 66 of the tape cutter 64.

[0049] After operation of the cutter, the amount of tape T projecting from the tape exit slit 32 and extending beyond the tape receiving portion 36 is advantageously less than the thickness of the lower case member at the side of the slit 32, which thickness is increased by the tape receiving portion 36. In this state the extreme, cut end of the adhered tape T on the tape cassette 10 side is held on the surface of the tape receiving portion 36. Consequently, even if the extreme, cut end of the adhered tape T is inadvertently pulled or pushed in the direction of the interior of the cassette case, the tape T can be pulled out again as the extreme cut end of the adhered tape T will not be lost within the cassette case.

[0050] As will be apparent from the foregoing, the extreme end of the film tape remaining in the cassette case after having been printed and fed out of the tape exit is received by and stopped at a bill-shaped tape receiving portion which extends from the tape exit of the tape cassette. Therefore, there is an advantage in that the tape cassette can be used without anxiety because the situation in which the end of the tape T is pulled or pushed into the main body of the cassette, and cannot thereafter be easily removed, can be substantially prevented.

[0051] Whilst in the illustrated embodiment of cassette the cassette is illustrated as accommodating a recording tape, an ink ribbon and an adhesive tape, the cassette may comprise other numbers of tapes, including a single tape-like member or two tape-like members. For example, the cassette may accommodate only a recording tape on which the image is to be printed by other than ink. Alternatively, the cassette may accommodate a recording tape in combination with either an ink ribbon tape (which is not fed from the exit aperture) or an adhesive tape (which is fed from the exit aperture with the recording tape). The above non-exhaustive examples of tape permutations are not to be regarded as limiting.

Claims

1. A tape cassette comprising a case and a tape-like member contained in the case, said case being provided with an aperture for the exit of said tape-like member from said case along a feed path, characterised in that said case is provided with protrusion means adjacent said exit aperture, said protrusion means protruding from said case in the general direction of the feed path.

2. A cassette claimed in claim 1, wherein said protrusion means extend along substantially the full extent of said exit aperture in a direction generally perpendicular to the direction of the feed path.

3. A cassette as claimed in claim 1 or claim 2, wherein said case includes a side wall and said protrusion means protrudes from an external surface of said side wall.

4. A tape cassette comprising a case and a tape-like member contained in said case, said case including a main accommodation case member and a cover member, said tape cassette further comprising engagement means provided on one of said cover member and said accommodation case member and receiving means provided on the other one of said cover member and said accommodation member, said engagement means and said receiving means being arranged to cooperate when said accommodation case member and cover member are put together to fix said cover member to said accommodation case member.

5. A cassette as claimed in claim 4, wherein one of said accommodation case member and said cover member is provided with shaft means for the fitting thereon of a rotatable spool around which said tape-like member is wound, and wherein one of said engagement means and said receiving means is provided on the end of said shaft.

6. A cassette as claimed in claim 5, wherein said shaft means is provided on said accommodation case member.

7. A cassette as claimed in any of the preceding claims, wherein said tape-like member is a recording tape for the printing thereon of images by a printing device.

8. A cassette as claimed in claim 7, wherein the cassette case further contains an ink ribbon to provide a source of ink for the printing of images on said recording tape.

9. A cassette as claimed in claim 7 or claim 8, wherein said cassette case further contains an adhesive tape for adhering to said recording tape after the printing of images on said recording tape.

10. A cassette as claimed in claim 9, when dependent on claim 1, wherein an end of said adhesive tape exits from said cassette case through said aperture adhered to said recording tape.

11. A cassette as claimed in any of claims 7 to 10, wherein said recording tape comprises a transparent tape.

12. A cassette as claimed in any of claims 7 to 11, wherein said adhesive tape comprises a double-sided adhesive tape.

13. A cassette as claimed in any of claims 1 to 3, wherein said cassette case contains a plurality of tape-like members, at least two of said plurality of tape-like member being arranged to pass out of said cassette case through said exit aperture.

14. A cassette as claimed in claim 4, wherein said cassette case accommodates a plurality of tape-like members wound around spools,
   wherein said accommodation case is provided with a plurality of shafts, each said spool being fitted onto a different one of said plurality of shafts,
   wherein said engagement means comprises a plurality of engaging members each of which is provided either on said cover member or an extreme end of one of said plurality of shafts, and
   wherein said receiving means comprises a plurality of receiving members for cooperating with said plurality of engaging members, each of said receiving members being provided either on an extreme end of one of said plurality of shafts or on said cover member in correspondence with an engaging member.

15. A tape cassette accommodating a tape-like member wound around a spool, said tape cassette comprising an accommodation case member provided with a shaft, said spool being rotatably fitted on said shaft, and a cover member for covering said accommodation case member, an exit aperture being formed in said accommodation case member, for the feeding therethrough of said tape-like member,
   wherein said accommodation case member has at least one protruding portion at said exit aperture, said protruding portion protruding by a predetermined amount in the feeding direction of said tape-like member and extending along said exit aperture, and
   wherein said tape cassette further comprises:
   engagement means provided on one of the extreme end of said shaft and said cover member; and
   receiving means provided on the other of said extreme end of said shaft and said cover member for receiving said engaging means to fix said cover member to said accommodation case member.

16. A tape cassette as claimed in any of claims 4 to 6 or claim 15, wherein said engagement means comprise of least one pair of snapping members.

17. A combination of a cassette as claimed in any of the claims 1 to 3 with a printing device, said printing device being provided with cutter means for cutting said tape-like member in the vicinity of said exit aperture when said cassette is, in use, mounted to the printing device.

18. A combination as claimed in claim 17 when dependant on claim 3, wherein said cutter means includes a movable cutter blade positioned on one side of said tape-like member feed path and a stationary cutter blade positioned on the opposite side of said feed path and said protrusion means protrudes from said cassette case side wall on said opposite side of said feed path.

19. A tape cassette comprising a case, a tape-like member contained in the case and tensioning means for tensioning said tape-like member when the cassette is inserted into a cassette accommodation chamber of a printing device, said tensioning means comprising a pivotable lever arranged to be pivoted to a tensioning position by the action of camming means provided thereon and further camming means associated with the cassette accommodation chamber of the printing device.

Drawing